what is all the liquid the government vehicles are laying down? #snowplowing #snowremoval

What happens here

This video explains why a liquid substance, identified as salt brine, is applied to roads before snowfall. The brine, a mixture of salt and water (and possibly other additives), is sprayed onto dry pavement. The water then evaporates, leaving behind salt crystals embedded in the pavement. These crystals are reactivated by snow or freezing rain, preventing ice from bonding to the road surface, which in turn makes snow plowing more efficient and cost-effective. The process is a proactive measure to enhance road safety and maintenance during winter weather.